There are three bases - FLL, TPA and AFW (Amazon Prime Cargo). You basically can get any of the three. They are desperate for pilots in all three. I think they need pilots the most in FLL as of this second, but realistically you will get which ever base you want at this point.

AFW Schedules right now are three days on (Flights leave about midnight and come back around 7 and 8am), then three days off, but I've heard they're going to be changing to 5 on 5 off.
FLL and TPA schedules vary from 1 day trips to 5 day trips, each day you could have an out and back turn or 4 legs... Most are 4 legs days. Regardless, you're back in your base/domicile at the end of every night.

If you'd like more info feel free to send me a PM.